Use full sofficerc for LOK.

Otherwise we get segfaults in cppu::idefaultConstructElements when exiting,
in addition to complaints of:
ignoring GError "Operation not supported" for <***RECURSION DETECTED***/log.txt>

Change-Id: If2f56873f50ba957288d1e5591db967d248ee7a4
Reviewed-on: https://gerrit.libreoffice.org/10005
Reviewed-by: Jan Holesovsky <kendy@collabora.com>
Tested-by: Jan Holesovsky <kendy@collabora.com>